Continuous propelling-vise for tube-making machines.



M. B-.LLOYD.

commuous PROPELLING VISE FOR TUBE MAKING MACHINES.

APPLICATION HLED OCT- 31. I913- I 1,321,463, Patented NOV. 11, 1919.

4 SHEETS-SHEET l. l

M- B. LLOYD. commuous PROPELLING VISE FOR TUBE MAKING MACHINES.1,321,463.

Patented Nov. 11, 1919.

4 SHEETSSHEEI' 2.

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CONTINUOUS PROPELLING VISE FOR TUBE MAKING MACHINES.

APPLICATION FILED OCT. 31,1913. ,1 21,463. Patented Nov. 11, 1919 4SHEETS-SHEET 3.

M, B. LLOYD. CONTINUOUS PROPELLING VISE FOR TUBE MAKING MACHINES.

APPLICATION FILED OCT. 3| 1913- 1,321,463. Patented Nov. 11, 1919.

4 SHEETSSHEEI 4.

, 1.4 am i a A? 6 25 121' 5p Bfnesses UNITED STATES PATENT OFFICE.

MARSHALL BURNS LLOYD, OF MENOMINEE, MICHIGAN, ASOIGNOR, BY MESNE ASSIGN-MEN'IS, OF ONE-HALF TO. THE ELYRIA IRON & STEEL COMPANY, OF ELYRIA,OHIO, A CORPORATION OF OHIO, AND ONE-HALF TO THE STANDARD PARTS COMPANY,A

CORPORATION OF OHIO.

CONTINUOUS PBOPELLING-VISE FOR TUBE-MAKING MACHINES.

Specification of Letters Patent.

Application filed October 31, 1913. Serial No. 798,559.

To all whom it may concern:

Be it known that I, MARSHALL B. born, a citizen of the United States,and a resident of Menominee, county of Menominee, and the State ofMichigan, have invented certain new and useful Improvements inContinuous Propelling-Vises for Tube Making EMachines, of which thefollowing 'is a specification.

' My invention relates generally to mechanism for welding elongatedarticles of various kinds and relates moreparticularly to mechanism forcontinuously welding tubing. The general object of my. invention is toprovide 1nechan'is1n wherewith elongated articles such as tubing and thelike can be welded more rapidly, more economically, and better thanispossible with mechanism hitherto devised. i

A further object of my invention is to provide simple and durablemechanism wherewith welded tubing of uniform strength and superficialsmoothness can be continuously manufactured.

M'y invention consists generally in an elongated endless vise formed tohold the work to be operated upon, and other means for moving the workthrough the vise at a speed determined by the character of the operationto be performed thereon.

My: invention consists further in mechaanism comprising an'elongatedendless vise formed to hold work in condition to be oper-t ated upon andopposing the movement of the work, and means for drawing the workthrough the vise, against the opposition thereof, at a substantiallyconstant rate of I speed.

My invention consists further in a weldmg machine comprising anelongated tubeholding vise, consisting of two opposed elements,anendless chain arranged for movement around each of the two'opposedelements, portions thereof successively moving into opposed relation andforming an elongated working stretch, said elements as. a whole arrangedfor movement to and from each other, and a welding torch arrangedadjacent to the two opposed elements.

My invention consists also in an elongated ulling vise comprising twocooperat'in endless chains,,a plurality of vise jaws at Patented Nov.11, 1919.

fixed to the chains against rotation thereon,

and pressure elements bearing upon the chains in one stretch and actingsuccessively to clamp the jaws upon the article to be moved.

My invention consists further in the unique arrangement, construction,and cooperation .of parts whereby the objects named above,

and others which will appear hereinafter, are attainable, all of whichwill be more readily understood'by reference to the 'ac-' companyingdrawings wherein:

Figure 1 is a plan view of mechanism embodying my invention Fig. 2 is aside elevation ofthe mechanism shown in Fig. 1;

Fig. 3 is an end view thereof;

Fig. 4 is a cross sectional view substantially on the line 4-4 of Fig.1;

Figs. 5 and 6 are respectively detail bottom plan and end views of thechain and vise block shown in Fig. 4 for gripping the work;

' Fig. 7 is an enlarged view of tube on line 77 of Fig. 1;

Fig. 8 is an enlarged view of tube on line 88 of Fig. 1; v

- Fig. 9 is a central longitudinal section substantially on the line 99of Fig. 1;

Fig. 10 is an enlarged view showing the mechanism for applying pressureto the vise jaws;

'Fig. 11 is a bottom plan view showing several of the .vise jaws and thechain links which carry them;

Fig. 12 is an end view of the vise jaw and chain link shown in Fig. .11;and

Figs. 13 and 14 are respectively a sectional elevation and a sideelevation of the clutch for; coupling the endless pulling vise to thepower shaft for actuatin it. I

In the formation of we ded tubin a great number of problems are presentewhich make difficult the rapid production of tubing which is uniform instrength, finish, size, and gage. A further problem is added when anattempt is made to produce welded tubing continuouslyand at a rapid rateof speed.

I shall limit my discussion here to'the manuity indescription. In orderthat the manufacture of such tubing may be better understood, I shallbriefly describe the manner of making it. The strip metal usually comesfrom the mills in large bundles. The bundle is placed upon a reel fromwhich it .is passed through several dies or rolls which The result ofthis is that a powerful pull is required to move the tube through thesemechanisms and particularly through the tube forming and weldingmechanisms. The tube forming and welding mechanisms are in effectelements powerfully resisting the movement of the tube. The result ofthis resistance is that it is difficult when welding tubing of certainkinds, for instance, thinwalled tubing, to prevent the pulling mechanismfrom crushing or marring the tube. Since much of the welded tubing isused for purposes where a finished and-polished tube is required, anyindentation or marring of the surface makes it practically unsalable.

Another difficulty encountered, especially in welding tubingcontinuously by simply passing under a heating element, is to preventopening of the Welded seam.

It is my purpose to provide mechanismwherewith the difficultiesenumerated can be successfully overcome, to the end that uniformlystrong and perfect welded tubing can be produced rapidly andeconomically. I shall -now describe my unique mechanism wherewith thedesired results are attainable.

Referring to the drawings, A represents a strong bench or table elevatedto convenient height by legs a, which'serves to sup- .port the diflerentmechanisms for acting upon the tube. The bench also usually containsother mechanisms for acting uponthe strip metal, such, for instance, asthe forming rolls or dies. At one end of the table I mount a uniquewelding device B and following this is a pulling device C arranged toreceive'its motion from'speed-reducing mechanism D. The tube T which hasbeen formed by the forming rolls or dies (not shown) contains alongitudinal seam t as it approaches the mechanism B (see Figs. 1 and 7)which is to be closed by welding. For convenience in description, let usassume for the present that the pulling mechanism C is capable ofpulling the tube through the forming mechanism (not shown) and thewelding mechanism at any desirable speed and that it does so act. Thewelding mechanism B comprises two opposed elements 6 6 around whichendless chains or vises b 6 are arranged to move; The elements 6 b areessentially of the same construction so that a detailed description ofone will serve for both. They comprise a body portion 6 containing anannular or continuous groove 6 In this groove 3) an endless chain 6 isarranged for movement. The chain 6 has fixed thereto a plurality of visejaws or blocks 6 the shape of which is determined largely by the shapeof the tube or article to be welded. Since I have shown a circular tubein the welding mechanism, I provide the block b with a semi-circularrecess 6 In order to lessen the friction caused by the moving chain Iinterpose between the chain .and the body portion b anti-friction rollsb". The elements 6 and Z2 are mounted upon a table Z2 for move ment aswill be described in detail hereinafter, to and from each other. By thismeans any desired pressure may be put upon the tube as it passestherethrough or, in other words, the mechanism B as related to thepulling mechanism C is adapted to present a resistance of variablemagnitude. At the mechanism B I arrange means for bringing the portionof the tube adjacent the seam to welding heat as the tube passestherethrough. The tube heating may be accomplished by various means. Onevery satisfactory means I find to be an oxy-acetylene torch. Hence Ihave mounted a torch o over the tube by means of a cross shaft 6supported on suitable brackets Z2 The torch projects a flame upon thetube, raisingthe portions adjacent the seam to welding heat, whence theyare joined by the pressure of the opposed elements 12 and 6 It is to benoted that I firmly hold the tube for a considerable length at thewelding zone. This I find to be of great utility because after the tubeis heated and joined by the means of pressure, it is held for a periodsuflicient to permit the edges to become firmly set so that when thetube emerges it has no tendency to open at the seam. As a result of thisI find that I can pass the tube under the welding flame at a greaterspeed than is possible where the tube is compressed at only a lineduring the welding operation and with the same torch and the sameconsumption of gas. Hence the cost of welding tubing is materiallydecreased with my novel elongated welding vise. Also because the endlesschain and vise blocks move directly with the movable elements Z2 and bthere is 116 lost motion between the parts and the tube can be firmlygripped without danger of marring. The chains and connected vise blocks,it will be understood, move continuously and grip successive newportions of the tube. Because of this characteristic I term the vise acyclic vise.

The elements 61 and b are mounted respectively upon movable bases b andb which contain V-grooves 6 for cooperation with the VS of the tablemember I). moving the bases 6, I9 to and from each other I arrange aright and left hand threaded screw 6 through both of the bases, so thatby simply turning a screw any desired pressure can be put upon the tube.

Since the tube is pulled through the mechanism B by means of the pullingdevice C it is desirable and necessary that the working stretch ofmechanism B, be perfectly alined with the working stretch of the pullingdevice 0, to prevent bending or distortion of the tube. For this purposeI also provide means for moving both the elements 6 and 11 togetherwithout disturbing their relative position. This is accomplished bymounting the base upon another base 6 which contains. Vs b upon whichthe table 6 may be shifted as awhole. The table I) can be shifted bysimple adjusting screws b arranged at each side for that purpose andperfect alinement of the mechanisms B and C is easily secured.

Having thus described the welding mechanism, I shall now describe indetail my novel vise wherewith it is possible to pull the tube throughthe welding mechanism at any desired rate of speed and without in anyway indenting or marring its surface.

In practice it will be understood that this vise also serves to pull themetal through the forming mechanism and that it often serves to push thetube through other mechanism, such for instance as polishing and cut-offmechanisms. This mechanism comprises two endless conveyers c 0 operableover sprocket wheels 0 a, 0 a. For

the sake of compactness I prefer to arrange the sprocket wheels in avertical plane and. for this purpose I provide horizontally di's' posedjournals 0 (i 0 and 0 which are supported in and from the main frame Theshafts 0 and 0 have respectively gears 0 and d keyed thereto, the gear 0meshing with gearing of the speed-re-i ducing mechanism D, which will bedescribed in detail hereinafter, and wherewlth the conveyers c and 0 aregiven continuous movement. Each of the sprocket wheels comprises acentral hub portion 0*. and two spaced disk-like portions 0". Thedisk-pow tions each contain a number of sprocket recesses c and theconveyer chain is provided with studs a the end portions 0? (see Figs.

11 and 12) of which engage said recesses.

It is obvious that rotation of the sprockets causes continuous movementof the conveyers. Because of the cycle-like movement of the conveyers 0and 0 I term them a cyclic vise. The upper and lower conveyers areessentially the same, so that a description of one will serve for both.

The conveyer comprises a chain portion composed of a plurality of chainlinks For upper conveyer chain 0 1 stud screw 0 serving for thatpurpose.

The "ise jaws 0 in this instance are each formed with a semi-circular orsubstantially semi-circular recess or groove 0 so that two of theopposite jaws serve substantially to inclose or encircle the tube. Inorder to secure a powerful pulling eflect it is necessary to providemeans for pressing the upper and lower conveyers upon the tube, and thisI do by simple and unique mechanism. Between the journals 0 and c Iarrange'a pressure member 0 This is a floating device and rests upon theupper conveyer c Arranged under this device, and contiguous to the upperstretch of the lower conveyer, is a similar device 0 The device 0 inthis instance, is not a floating device, but,

, on the contrary, is firmly attached to the In order to move the upperdevice 0 toward the lower, I provide two long bolts 0 on each sidethereof, which extend into threaded bosses in the lowerfixed device 0 Byscrewing the bolts the upper mem ber 0 can be brought into forcefulcontact with the lower or working stretch of the Sincethis movement isopposed by the fixed lower device, it is obvious that the tube will befirmly clamped and that any desired pressure up to the crushing strengthof the tube may be created. The tube, however, will standtremendouspressure without being marred or crushed because the jaws areformed to inclose substantially all of the tube. The pressure or powernecessary to pull certain of the tubes, through the welding and othermechanisms is often very great, and for this reason it is desirable andnecessary to provide means for reducing the friction between thepressure blocks and "the moving conveyers. I have devised mechanism forthis purpose which will be best understood by reference to Figs. 9 and10. The device 0 consistsof an elongated solid portion 1 the length ofwhich approximates the working stretch of the vise. This block serves asa runway for a plurality of anti that before any pressure is put uponthe blocks by thedevices 0 and 0 the blocks are perfectly alined withthe tube. This is a very important feature since, by such aconstruction, any tendency to dent or mar the tube is positivelyprevented. The conveyer chains as they pass through the upper and lowerpressure blocks 0 and 0 are also limited to rectilinear movement and asthe vise blocks are affixed thereto against rotation tllOl'B'lS nopossibility of the vise jaws indenting the tube in the working stretchof the vise. I prefer so to proportion the blocks and rollers that eachof the blocks will always be engaged by two or more of the rolls. Afterthe working stretch, the conveyer chains gradually re cede from thetube, and therefore have no tendency to mar it when being releasedtherefrom. The spaced construction of the sprocket wheels permits megreatly to decrease the length of the vise since the pressure blocks canextend therebetween into close proximity to the sprocket hub.

In the manufacture of tubing, it is often necessary to stop the movementof the tubing for an instant to inspect it or to fix the welding flameor some part of the welding mechanism. This is usually for such a smallperiod that it is not expedient to stop the entire pulling mechanism.For this reason I prefer to provide a separate clutch for con nectingand disconnecting the conveyer chains with the driving mechanism, andfor this purpose I provide on the shaft 0 a clutch 0 This will be bestunderstood by reference to Figs. 13 and 1-l. Fixed to the shaft is agear 0 which engages with one gear of the gearing D, and whereby it isgiven its motion. -The gear 0 contains an inner friction surface 0 andfor engagement therewith I provide an expanding friction band 0 The band0 can be expanded by simply shifting the block 0 on the shaft 0 as willbe obvious by reference to Figs. 13 and 14 referred to. For shifting theblock 0 I provide a stand-post 0 vertically supported in suitablebearings 0 and at the lower end of which is a fork 0 which engages theblock 0 Hence by rotating the stand-post- 0 the clutch can be thrown into start the machine. As considerable frictional contact is necessary, Iprefer to provide a .long leverage for turning the standpost, and forthis reason mount a horizontal pipe 0 at the upper end of thestand-post. This forms a convenient means for operating the clutchand.one which is easily accessible from any part of the ma chine andparticularly from a position near the welding portion since much of theattention of the operator is directed to that mechanism.

For most welding purposes but a slow movement of the tube is required,and for this reason a small motor, properly geared, is suflicient toexert the pull required. The driving mechanism D is mounted upon crossshafts (Z (Z and comprises a number of gears (Z 0?, (Z (Z (Z and (Z Themember d is keyed to the shaft (Z and meshes with the gear (1 which isloose upon the shaft (1, and which imparts motion to the gear by meansof clutch (1 The gear d in turn meshes with the gear (Z which impartsmotion to the gear (Z by means of the clutch (1, and from the gear (Ithrough the gear (7 the gear member on the shaft 0 is rotated. The shaftd is actuated by the motor through'the medium of the belt and pulley 16and d".

The mechanism here shown and described is adapted successfully toaccomplish the objects stated in the opening of the specification, andit is believed that the many advantages thereof will be apparent tothose skilled in the art to which it appertains. Since variousmodifications will readily suggest themselves to others by thisdisclosure,

I do not wish to limit myself to the specific construction and useherein shown and described, except as may be necessary by expresslimitations in the claims hereunto ap pended. i

The welding mechanism herein shown is not claimed in this applicationbut is described and claimed in a divisional application, Serial Number150,553, filed Feb. 23, 1917, entitled Welding device.

I claim 2,-

1. In a device of the class described, the combination of a pulling visecomprising two endless chains, a plurality of vise jaws rigidly attachedto the links of respective chains, means for successively movingportions of the chains together successively to clamp the vise jaws uponthe article to be moved, and means limiting the chains to rectilinearmovement in the working stretch.

2. In a'pulling vise, the combination of two cooperating endless chains,a plurality of vise jaws rigidly fixed to respective links of saidchains, and pressure elements bearing upon the chains in one stretchsuccessively to clamp the jaws upon the article to be moved.

3. In a continuous vise, the combination of two endless chains andsprocket wheels upon which they are secured in opposed relation, with aplurality of vise jaws fixed on the links of each chain, pressureelements arranged to force successive pairs of opposed jaws toward eachother to clamp the article to be drawn and limiting the jaws thereafterto rectilinear movement for a predetermined length, and anti-frictionmeans interposed between the pressure elements and the chains.

4. In a continuous vise, the combination of two endless cyclic chains, aplurality of vise jaws afiixed to the links in end to end abutment whenmoving in a straight line, and rigidly held on the chains, pressureelements arranged to force successive pairs of jaws toward each other toclamp the article to be drawn and limiting the aws thereafter torectilinear movement for a predetermined length, and anti-friction meansinterposed between the pressure elements and the chains.

5. In a continuous cyclic vise, the combination of two endlesschains, aplurality of vise blocks rigidly fixed on each of the chains, twopressure elements for successively forcing portions of the chainscontaining opposed pairs of vise jaws together to .clamp the tube, oneof said pressure ele ments being fixed against movement, and the otherthereof being movable to and from the fixed element.

6. In a continuous cyclic vise, the com bination of two endless chains,a plurality of vise blocks rigidly. aflixed to each of the chains, twopressure elements for successively forcing portions of the chainscontaining opposed pairs of vise jaws together .to clamp the tube, aplurality of anti-friction means interposed between the chains and thepressure elements, and one. of said pressure elements being fixedagainst movement and the other thereof being movable to and from thefixed element. 7. In a cyclic work forwarding-vise, the combination oftwo endless chains mounted with elongated portions thereof in contig-.

uous opposed relation, a vise jaw on each link of each chain and rigidtherewith, and

anti-friction rollers arranged to bear upon the blocks of the chainlinks in aforesaid continguous portions of the chains.

8. In a cyclic work forwarding vise, the combination of two endlesschains each composed of pivotally connected block links, with a vise jawon each link and anti-frictionrollers arranged to bear upon theaforesaid contiguous portions of the chains, the

arrangement being such that a number of rolls bear oneach link and serveto limit the chain links and attached vise jaws to rectilinear movement.

9. In a work pulling vise, the combination of two cyclic endless chains,a plurality of vise jaws rigidly afliXed to the chain and thus heldagainst rotative movement thereon, means for causing the gradualapproach of opposed pairs of vise jaws and adjusting same .to parallelposition .and means then acting firmly to clamp the opposed jawstogether.

10. In a work pulling vise, thecombination of two cyclic endless chains,a plurality of vise jaws rigidly affixed to each chain I and thus heldagainst rota-tive movement thereon, means for gradually causing the ap--proach of opposed pairs of vise jaws and ad usting same to parallelposition, and means then' acting firmly to clamp the jaws upon the work,said means limiting the jawsto rectilinear movement through apredetermined length and permitting the retraction of the jaws torelease the article.

11, In a device for pulling tubes, rods,

and the like, the combination of two elongated cyclic chains, aplurality of vise jaws rigidly affixed to the links of each chain andthus held against rotative movement thereon, and mechanism formedsuccessively to move the working stretches of the chains together andclose the vise blocks upon the article to be drawn and formed at eachend to cause the gradual approach of the blocks to the work and thegradual retraction thereof from the work, as and for the purposespecified.

12. In a vise for pulling elongated articles, the combination of foursprocket wheels arranged in spaced pairs, each sprocket comprising twospaced link engaging portions, two endless chains engaging respectivespaced pairs of sprocket wheels and spanning the space between thespaced portions thereof, and pressure elements ar ranged betweenrespective pairs of sprocket portions and having their ends accommodatedbetween the spaced apart portions of said wheels.

sprocket comprising two spaced link engaging portions, two endlesschains engaglng respective spaced pairs of sprocket wheels and spanningthe space between the spaced portions thereof, and pressure elementsarranged between the sprocket por-' tions and having the end portionsthereof extending into the spaces between the portions of respectivesprockets, said pressure elements being relatively movable to and fromeach other to'm-ove portions of the chains and attached vise jaws towardand from each other.

15. In a vise for pulling elongated articles, four sprocket wheelsarranged in spaced pairs, each sprocket comprisingtwo spaced linkengaging portions, in combination with two endless chains engagingrespective spaced pairs of sprocket wheels and spanning the spacebetween the spaced portions thereof, and pressure elements arrangedbetween the spaced sprocket portions and having theend portions thereofextending into the spaces between the portions of their respectivesprocket wheels,

one of said pressure elements being fixed to the frame of the machineand the other movable toward the fixed element, and means' for movingthe movable element.

16. In a vise for pulling-elongated articles, the combination offoursprocket wheels arranged in spaced pairs, each sprocket comprisingtwo spaced link engaging portions, two endless chains engagingrespective spaced pairs of sprocket wheels and spanning the spacebetween the spaced portions thereof, pressure elements arranged betweenthe spaced sprocket portions and having their end portions extendinginto the space between the two portions of each sprocket, and means fordriving said sprockets and chains.

17. In a vise for pulling elongated articles, the combination of foursprocket wheels arranged in spaced pairs, each sprocket comprising twospaced link engaging portions, two endless chains engaging respectivespaced pairs of sprocket wheels and spanning the space between thespaced portions thereof, pressure elements arranged between the spacedsprocket portions and having their ends extending into the space betweenthe two portions of each sprocket, mechanism arranged to impart motionto the endless chains, and a clutch for connecting the movable chains tosaidmechanism.

l8. Inga vise for pulling elongated articles, the combination of foursprocket wheels arranged in spaced pairs, each sprocket comprising twospaced link engaging portions, two endless chains engaging respectivespaced pairs of sprocket wheels and spanning the space between thespaced portions thereof, pressure elements arranged between the spacedsprocket portionsand having their ends in the space between the twoportions of each sprocket, mechanism arranged to impart motion to theendless chains, a clutch for connecting the movable chains to thedriving mechanism, and a stand-post for operating said clutch.

19. In a machine of the class described, an endless vise composed of twoendless chains, a plurality of vise jaws rigidly but detachably receivedto respective links of said chains'acting to close the vise jaws at agiven point in the chain travel and thereby grip an object.

20. In a machine of the class described, an elongated endlessvisecomposed of two endless chains and vise block elements, a

plurality of vise jaws rigidly secured directly to each chain, saidchains traveling in a cycle and means for moving the chains and attachedvise. block elements successively together to grasp an object at a givenpoint and to limit the chain and vise blocks to'rectilinear motion whenin engagement with the article.

21. An automatic single direction continuous vise composed of a conveyerand elongated endless series of longitudinally abutted vise jawsthereon, in combination with mechanism for driving said series, pressureguides co-acting with respective series of jaws in one stretch thereofto cause the jaws to close together upon entering said stretch, holdingthem in closed position while passing throu h said stretch, and limitingthem to rectilinear motion therein.

22. An automatic single direction continuous vise composed of a conveyerand elongated endless series of longitudinally abutted vise jawsthereon, in combination with mechanisnr for driving said series,pressure guides co-acting with respective series of jaws in one stretchthereof to cause the jaws to close together upon entering said stretch.holding them in closed position while passing through said stretch, andlimiting them to rectilinear motion therein, and anti-friction devicesoperatively interposed between said guides and chains.

23. An automatic single direction con tinuous vise composed of twoelongated chains, each thereof carrying a plurality of vise jawsattached thereto and rigidly held against rotation thereon. incombination with means for driving the same, means for moving'the jawsinto parallel relation with the article to be drawn and means acting toclose the vise jaws upon the article and antifriction devices interposedbetween said means and the chain constituting said stretch.

24. In a continuous vi'se, two pairs of sprocket wheels mounted. in thesame plane, block chains traveling on respective pairs of sprocketwheels and having their opposed stretches in parallelism. vise jawsfastened to the links of the chains, parallel guides wherebythe opposedstretches of the jaw equipped chains are held together, and anti--friction devices interposed between the backs of the chains andrespective guides, said anti-friction devices traveling at a differentrate of speed than the chains.

25. In a continuous vise, two pairs of bifurcated sprocket wheelsin-opposed relation, block link chains carried by respective pairs ofsprocket wheels through the medium ofthe pivot pins of the links,,a

pressure bar for each chain, a roll race inclo'smg sald bar and havingits ends within.

in respective bifurcated sprockets, end a a my hand, this 23rd day ofOctober, l913, in

series of rolls filling said racevfor coactiqn the presence of twosubscribing witnesses.

with the backs 0i respective block links; the

lines bf coaction between the rolls and the I MARSHALL BURNSiLLQYD backsof said links being projected beyond .Witnesses:

-a tangent to the sprocket wheels. HILDA O. PETERSON In testimo'nywhereof, I have hereunto set R. W. WELLS.

